作物生长季地表及耕作层地温的变化特征

为了研究辽西山区小流域地表及耕作层温度变化状态，从气候角度出发，运用气候倾向率等分析方法，分析了建平丘陵山区1959—2012年作物生长季地表温度、耕层温度变化趋势和特征。结果表明：建平的南、北部地表、耕层温度因地域性相差2.2℃，4—10月地表、耕层温度呈明显增加趋势，南部气候倾向率分别为0.288℃/10 a和0.248℃/10 a；北部气候倾向率分别为0.309℃/10 a和0.312℃/10 a。异常高温年出现在20世纪90年代之后，而异常低温年则出现在20世纪80年代之前。南部地表、耕层温度升高过渡区间在1981—1993年，1994年突变；北部过渡区间在1981—1996年，1997年突变。研究结果对辽西山地小流域治理，气候资源利用开发，合理安排农业生产提供参考。

Temperature Change Features in Ground Surface and Topsoil During Crop Growing Season

In order to study temperature changes of the topsoil and ground surface small watershed in mountainous area of western Liaoning, the author analyzesd surface ＆ topsoil temperature tendency and features of Jianping Hilly Region during crop growing season from 1959 to 2012, from the climatic point of view, by unitizing climate tendency rate analysis methods. It was shown from the results that： the surface and topsoil temperature difference was 2.2 ℃ between Jianping＇ s southern and northern region due to territorial factors, from April to October, the surface and topsoil temperature increased significantly, their southern climate tendency rates were 0.288 ℃/10 a and 0.248℃/10 a; their northern climate tendency rate were 0.309℃/ 10 a and 0.312℃/10 a. Unusual high temperature climate occurred after 1990s, and extreme cold climate appeared before 1980s. The transition range of southern surface and topsoil temperature was from 1981 to 1993, and the climate changed suddenly in 1994; the transition range of northern surface and topsoil temperature was from 1＇981 to 1996, and the climate changed suddenly in 1997. The results provided reference for minor drainage basin management, climate resources development, and reasonable arrangements for agricultural production in western Liaoning Mountainous Region.